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12 CONTROL AUXILIARY FUNCTIONS
(4) Setting the speed change function using an external start signal
The speed can also be changed using an "external start signal".
The following shows the data settings for changing the control speed of axis 1
using an "external start signal". (In this example, the control speed is changed to
"20.00mm/min".)
(a) Set the following data to change the speed using an external start signal.
(Use the start time chart shown in section (2) below as a reference, and set
using the sequence program shown in section (3).)
Setting item
Setting
value
Setting details
Remote input/output,
remote register, buffer
memory address
Axis 1 Axis 2
Pr.43
External start
function selection
1 Set "1: External speed change request". 62 212
New speed value 2000 Set the new speed.
RWwm+4
RWwm+5
RWwm+12
RWwm+13
External start valid ON Set "ON: Validate the external start". RY(n+2)B RY(n+4)B
* Refer to section "3.4 Specifications of input/output signals for master module", "3.5 Remote registers" and
"5.2 List of parameters" for details on the setting details.
(b) The following shows the speed change time chart.
Pr.43 External start function selection
New speed value
V
t
2000
1
In speed change processing flag
External start valid
Dwell time
BUSY signal
Error detection signal
Remote station READY
signal
Positioning start signal
Positioning complete signal
D75P2 READY signal
Start complete signal
[RY(n+1)0]
[RXn4]
[RXn0]
[RX(n+7)B]
[RXn1]
[RXnA]
[RXn7]
External start signal
[RX(n+1)1, RX(n+4)1]
[RWwm+4 to 5, RWwm+12 to 13]
[RY(n+2)B, RY(n+4)B]
Fig. 12.26 Time chart for changing the speed using an external start signal